2. Honeywell AirGenius5 Air Cleaner/Odor Reducer, 250 sq. ft.(Click Link to Check Price on Amazon)Editor’s Rating : 9 out of 10Permanent, washable QuietClean® ifD® filters capture up to 99.9% of particles as small as 0.3 micronsActively yet quietly circulates and filters the air up to 5 times an hour in a large room (250 sq. ft.)